Below is a round-up of the birth announcements from British newspapers. Sources include a national paper (The Telegraph, The Times) and a broad range of local newspapers from across England, Wales, Scotland and Northern Ireland.
Sibling names are in brackets. No official surnames are included; any name ending in a surname is actually a middle name.
Boys:
Andreas Panaghis
Aubrey
Gabriel Sigurd Evert August
George Alexander
Edward Roger Guy (Romy Beatrix Alma)
Elliot Freeman
Felix Kenneth Derek (Alma & Jasper)
Hugh Anthony
Jesse Patrick (Hamish)
Ludo James Caspar (Arthur Basil Stuart)
Maksymilian Artur
Oliver Henri Richard
Raphael Henry Philip
Roman (Dylan)
Rory Corbin
Rudy Casper Ludo
Rufus Francis (Ada)
Sage Hekima -- Hekima means "wisdom" in Swahili.
Sebastian Charles
Thomas Fergus Richard Holland (India Iris & Selena Anthea)
Girls:
Charlotte Isla Rose (George & Sophie)
Chloe Elizabeth
Emerson Anne
Florence Charlotte Theodora
Halle-Rae
Honor Ada Hardwick
Lara Sue
Lyla Pembe Elizabeth
Octavia Poppy Gigi (Pandora Cleo Florence)
Olympia Elizabeth Amador
Ophelia Ruth Katinka
Phoebe Beatrice Rose (Lyra Veryan Tiger)
Poppy Margot
Raina (Sarina)
Rosemary Joy
I cross-reference older BAs to find the full names of the siblings, however often they are missing (especially the eldest siblings, or for half-siblings) which explains why you will sometimes see something like: George Henry (Lucy, Emma & Jack Arthur). "Lucy" and "Emma" may well have middle names as well; I simply cannot find them online.